Blowpipe-burner.



PAri-:NTBD MAR. 31, 1903.

- H.' s. BURTON.

-BLOWPPB BURNER.

APPLIOATION FILED DBO. 6. 1902 I0 MODEL.

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UNITED STATES PATENT OFFICE.

HARRY SANFORD BURTON, OXFORD, ENGLAND.

B LOWPI-PE-BU RNER.

SPECIFICATION forming partof Letters Patent No. 724,257,datecl March 31, 1903. Application iled December 6, 1902. Serial No. 134,151. (No model.)

To all whom it may concern:

Be it known that I, HARRY SANFORD BUR- TON, a subject of the King of Great Britain, residing at 63 St. Giles, Oxford, county of Oxford, England, have invented certain newV and useful Improvements in the Construction of Blowpipe-Burners, of which the following is a specification.

This invention relates tothat class of blowpipe-burner in which an atmospheric flame gas-tube end, showing a modified construc-- tion. Fig. 4 is a plan of the lower half-cup and gas-valve, showing the hole for allowing gas to pass to a pilot-light.

The appliance is made in two pieces, affixable together and movable about their joint to open or close the gas-supply. One part, 1, is connected by a liexible pipe joined on at 2 to a gas-supply, and such partor tube carries atubular valve 3, controlled by a spring 4, said valve being provided with holes 5, through which the gas passes to the valveface 6. The other part, 7, is provided with a valve-seating 8 at one end, such valve-seating being composed of a flexible ring recessed in or attached to a liange 9, as at Fig. 1, or it may be the metal flange 9a on the end of the tube 7, as at Fig. 3, so that either a flexible or hard seating can be employed. The tube 7 also carries the air-pipe 10, passing out of the tube and projecting alongside the tube 1, so that the two form a handhold to enable the tubes 7 and lO to be moved to open or close the gas-supply, as hereinafter explained.

The air-pipe terminates as a nozzle at the end 11, just inside the end 12 of the tube 7, thus forming a chamber for the admixture of the gas and air, both under pressure, toform the atmospheric flame, the end 12 being encircled by a short tube 13, which can be pulled out to make the chamber larger, if desired. The end 14'of the air-pipe is connected bya flexi- `ble pipe to the air pump or supply, this being usually a bellows worked by the operators foot.

The end 15 of the tube l is formed of semispherical shape and is provided with a screwthread for connection of a correspondingshaped head 16, encircling the tube 7, a rubber washer or flexible diaphragm 17 being arranged between the tube 7 and the head 16 to insure a tight joint.

In the position shown at Fig. 1 all parts are assembled in "their normal condition, the halfcups 15 16 screwed together, the rubber Washer 17 being compressed against the halfcup 16 to insure a tightjoint, the spring 4 forcing the gas-valve 3 on its seat 8 to insure a shut oft of gas or if a hole V18 be made in the valve, as at Fig. 4, to only supply a small amount of gas at the burner, so as toact as a pilot-light when the apparatus is not in use.

When it is desired to use the appliance, the operator first starts the air-blast and catches hold of the appliance, pressing the tubes l and l0 together, this action canting the tube 7 and the valve-seating, as at Fig. 2, compressing the rubber washer 17, and opening the valve, the degree of opening being determined by the amount of angle given to the tubes 7 and 10, thus regulating the supply.

19 is a hook by which the appliance can be hung onto a nail readyfor use when required.

By this invention the degree of blast can be automatically regulated with one hand, the other hand beingleft free for manipulation of the work under operation.

What I claim, and desire to secureby Letters Patent, is Y l. A blowpipe-burner including a pair of tubes arranged end to end,.one havinga valve and the other a seat for said valve, and one of said tubes being angularly movable with respect to the other, whereby, on suchmovement, the valve will be forced open, a gastight casing surrounding the adjacent ends of the tubes, and a blast-pipe coperative with one of said tubes.

2. A blowpipe-burner including a pair of tubes arranged end to end, one havinga valve ILO and the other a seat for said valve, and one of said tubes being angularly movable with respect to the other, whereby, on such movement, the valve will be forced open, said valve having a reduced bore for the passage of a slnall stream of gas, a gas-tight casing surrounding the adjacent ends of the tubes, and a blast-pipe coperative with one of said tubes.

3. A blowpipe-burner consisting of upper and lower tubes abutting against each other, the lower tube having a valve, and the upper a seat for said valve, two detaehably-connected spherical cups surrounding the ends of the tubes, the lower cup being united with the lower tube and the upper cup being free of the upper tube, a resilient packing in the uppercup surrounding the upper tube, and a blast-pipe coperative with the upper tube.

In testimony whereof I have hereunto set my hand in presence of two subscribing witmesses.

HARRY SANFORD BURTON. Vitnesses:

WILLIAM HENRY PARTRIDGE, FREDERICK TURNER. 

